I was looking into a solar mine for one of my s19s and I noticed the power supply puts out 12v DC to the boards so I was thinking y not bypass the power supply ( avoiding the power loss from DC to AC then back to DC) and just direct wire to the board bus bar.
Discussion
You can't do that. You need a voltage regulated power supply. Bypassing the safeties built in really puts your whole setup at risk.
You MUST use a solar charge controller of good quality to make the most of your panels.
Solar charge controllers are designed to charge batteries, not power things directly.
Not having batteries means that you can undervolt your system if there are high, transient draws, which can roast components as the amps ramp up with the dropping voltage.
Even with batteries and a good solar charge controller, you need a DC-DC regulated power supply to make sure the supply voltage stays where it needs to be with a clean enough output to not fry your boards.
So... Yes, you CAN run direct DC, but at the bare minimum, you need the DC side of things with a solar charge controller and a battery preceding a DC-DC regulated power supply that can handle the variable battery charging voltage and output enough wattage to run your S19 at the desired power level.
One other thing that I don't know is if there is a feedback system between the control board and the power supply. If there is, your cannot just feed the control board with DC power and expect things to not get fried.
Look into what 100 acre ranch is doing…